<?php

$a = 'Hello';
$b = 'World';

echo $a;
echo "\n\n";
print $a;
echo "\n\n";
###############################3
echo "This is $a and $b";
echo "\n\n";
print "This is $a and $b";
echo "\n\n";
###############################3
echo 'This is ',$a,' and ',$b;
echo "\n\n";
print 'This is ',$a,' and ',$b;
echo "\n\n";
